Quality of surface waters of the United States, 1968
Subtitle: Parts 4 and 5. St. Lawrence River basin, and Hudson Bay and Upper Mississippi River basins.
Series: U.S. Geological Survey water-supply paper -- 2094
Publisher: U.S. Government Printing Office
Published: 1973
Place of publication: Washington, DC
Language: eng
Number of pages: 293
Subjects: Water-supply -- United States.; Water -- Composition.
Notes: 1